Instantaneous steam-generator.



. No. 805,961. y PATENTE Nov. ze, 1905.-

` E. E. HUMMEL.

INSTANTANEOUS STEAM GENEIMETOE.v E

EEEIOAEIOE EILED nEo.22, 1904.

2 SHEETS-SHEET 1.

PATENTED Nov. v2a, 1905.

E. E. HUMMEL.

2 INSTANTANEOUS STEAM GENERATOR.

APPLIOATION FILED 3110.22, 1904.

2 SHEETS-SHEET 2..l

- UNITED STATES PATENT oFFICE.

FRANKLIN PIERCE HUMMEL, oF BELLEVUE, CHIo INSTANTANEOUS STEAM-GENERATOR.

into steam and which are commonly known as iiashers, the object of theinvention being to'sirnplify and improve the construction and operationof this class of devices.

With these and other ends in View, which will readily'appear as thenature of the invention is better understood, the same consists in theimproved construction and novel arrangement and combination of parts,whichwill be hereinafter fully described, and particularly pointed outin the claims.

In the accompanying drawings has been illustrated a simple and preferredform of embodiment of the invention, it. being, however, understood thatno limitation is necessarily made tothe precise structural detailstherein exhibited, but that the right is reserved to any changes,alterations, and modiiications to which recourse may be had within thescope of the invention and without departingfrom the spirit orsacrificing the eiiition, with part of the casing removed, of an takenon the line 3 3 in Fig. l.

instantaneous steam-generator constructed in accordance with theprinciples of the invention. Fig. 2 is'a sectional elevation of thesame. Fig. 3 is a horizontal sectional view Fig. 4 is a perspectivedetail View of the connectingframe for the generator-coils. Fig. 5 is asectional detail view showing the union between two heating-tubes ofdiiierent diameters.

Corresponding .parts in the several ligures are indicated by likecharacters of reference. The generator-tubes of the improved iiasher aredisposed within a casing C, which is preferably elongated or ellipticalin horizontal section rather than circular, this shape being preferredin order to enable a generator of considerable capacity to be stored incomparatively limited space-as, for instance, under the seatof anautomobile-for the purpose of supplying motive power, to which thisimproved device-will be found tobe particularly welladapted. The saidcasing may Specieation of Letters Patent. Application filed December22,1904. Serial No. 237.978.

con-sist of an outer shell l, of sheet-steel, and

alining 2, likewisev of sheet-steel, the space between the outer casingand the lining beingl packed with asbestos or other suitablenonconductive material, as shown at 3'. In the lower part of the casinghas been shown heating means (illustrated as a burner 4:) of anysuitable construction. understood that heating means'of any wellknownkind whatsoever may be used in connection with the invention and thatIdo not consider myself as limited in this-respect.

Patented Nov. 28, 1905.

It will of course be The casing C is provided with openings, as 5,

for the escape of products of combustion.

The generator proper iscomposed of a plurality of coils of tubing,preferably of the kind which is known'as Shelby steel tubing, and in theconstruction of the device tub- 4 ing of diiierent sizes will beemployed; In the form of embodiment of the invention herein shown tubingof three dierent sizes has been employed; but within the scope of theinvention any number of diiiierent sizes above two may be employed,andthe relative proportions may be other than those which will be nowdescribed, 'the description applying particularly to the form ofinvention herein illustrated. Beginning, then,at the upper end of thegenerator, I have shown ten coils, all of which are made of what isknown as standard quarter-inch-iron-size tubing, live of said coils(designated 6) being oblong or elliptical in shape, while other iivecoils (designated 6a) are spirals. In the present instance the uppermostcoil is elliptical, and the elliptical and spiral coils alternate, sothat the last of the ten coils will be a spiral. The next tive coils,which are designated 7 and 7 a, are of a larger size of tubing than theupper coils, being preferably of what is known as three-eighthinch ironsize. The y uppermost elliptical coil 7 is coupled to the lowermostspiral coil 6, and the elliptical coils 7 and spiral coils 7 i aredisposed alternately, as shown. A'third set of coils of a still largersize, being of onehalf-inch-iron-size tubing, has been shown. Four ofthese coils have been shown, the elliptical coils being designated 8 andthe spiral coils 8. rI he lowermost coil of the intermediate size beingan ellipse, the uppermost coil of the larger size will be a spiral andthe lowermost coil of the larger size will be an ellipse.

The elliptical and the spiral coils of the several sizes are all madeseparate and are connected with each other by means of right and leftthreaded unions or couplings9. Special IOO IIO

couplings l0, having right and left threaded openings of differentdiameters, but with threads of the same pitch, are employed for couplingtogether the coils made from tubing of dierent diameters. By thisarrangement any one coil which may show signs of wear or of burning outmay be removed and replaced by a new one, leaving the remainder of thegenerator intact. rfhe terminal of the uppermost coil 6 is extendedthrough the casing and is suitably connected with the feed-water supply.The terminal of the lowermost coil 8 is likewise extended through thecasing and connected with the point where the steam developed in thegenerator is utilized.

The several coils constituting the generatortubes are assembled by meansof bolts 11, serving to connect a pair of spiders 12, said bolts andspiders. constituting a frame which retains the several coils or tubingin a convenient and effective manner in proper relation to each other,while at the same time access may be had to any one of the coils bydisassembling the frame. In assembling the parts the coils are strungupon the bolts, as will be readily understood by reference to thedrawings.

It will be observed that the largest coilsthat is, the coils composed ofthe largest-sized tubing-are disposed most closely adjacent to theheating means and are consequently exposed to the greatest degree ofheat, while the coils composed of tubing of less cross-sectional areaare placed more remotely from the heating means. A degree of heat willbe maintained, however, which will cause the feedwater as it entersthesmaller coils to be vaporized practically instantaneously, the steamexpanding downward ly through the coils composed of tubing of greatercross-sectional area, where the steam becomes superheated prior to its(passage to the point where it is to be utilize As will be seen from theforegoing description, this improved iiasher or instantaneoussteam-generator is simple in construction, and owing to the peculiararrangement of the generator-coils herein described the operation willbe found very effective. By alternating the elliptical and spiral coilsa free draft is provided, while at the same time the greatest possiblesurface is exposed to the action of the Haines. By gradually increasingthe size of the pipes through which the steam passes ample allowance ismade for the expansion of the steam, and the largest coils beingdisposed where the heat is greatest the steam will pass from thegenerator at the point where it is most intensely heated, andconsequently most.

capable of producing power.

As hereinbefore stated, the number of the coils employed and therelative number and v arrangement of the different-sized coils may meansfor assembling the coilsl or for supporting the same within the easingor with regard to the exact shape or proportions of the individualcoils. Thus, for instance, the coils which have been described as beingof spiral shape might be elongated to a less extent than the coils whichhave been described Lt l u as elliptical. Under some conditlons even thecoils vmight all be of the same shape; but for reasons hereinbeforestated the construction and arrangement herein described is deemedadvantageous and preferable.

The spiders 12 of the frame serving to connect the generator-coils havebeen shown as provided with coil-engaging hooks 15, adapted to engagethe outermost coils, and thereby greatly assist in securing the saidcoils in the desired relative position.

Having thus described the invention, what is claimed isl. In a iasher, aplurality of coils for the generating and superheating of steam, thetubing of the superheating-coils being disposed nearest the source ofheat and of greater crosssectional area than that of thegeneratingcoils.

2. In a Hasher, a casing, heating means, and a plurality of coils forthe generating and superheating of steam; the tubing of thesuperheating-coils being of greater cross-sectional area than that ofthe generating-coils; the coils of the largest tubing beingdisposed inclosest proximity to and the coils of the smallest tubing most remotelyfrom the heating means.

3. A steam-generator composed of groups of coils formed of tubing ofdifferent crosssectional area; the tubing of the coils disposed mostnearly to the point of introduction of feed-water and most distant fromthe source of heat being of the smallest relative crosssectional area,while the 'tubing of the groups of coils more distant from the point ofintroduction of feed-water and nearer the source of heat are ofrelatively larger cross-sectional area; the tubing of the coils fromwhich the steam escapes being nearest the source of heat and relativelythe largest.

4. In a flasher, a plurality of groups of coils of tubing ofgradually-increasing crosssectional area from the point of introductionof feed-water, which is remote from the source of heat to the point ofescape of steam which is closely adjacent tothe source of heat.

5. In a flasher, a plurality of groups of coils of tubing, ofgradually-increasing crosssectional area from the point of introductionof feed-water to the point of escape of steam which is nearest thesource of heat; each group being. composed of elongated andapproximately spiral coils arranged in alternate order; and unionsdetachably connecting the coils of adjacent groups.

6. In a flasher, a plurality of groups of coils of tubing ofgradually-increasing cross- IOS IIC

order; and unions' detachably connecting the individual coils-and thedifferent-sized types of adjacent groups.

7. A plurality of coils for generating and superheatingsteam,v and aconnecting-frame including spiders and bolts separably connecting saidspiders; the latter being provided with hooks engaging and supportingthe upper and lower coils. Y

In testimony that I claim the-foregoing as my own I have hereto affixedmy signature in the presence of two Witnesses.

l FRANKLIN PIERCE HUMMEL. Witnesses:

J. P. VICKERY, J. W. CONKLE.

